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Author Topic: Moblie vff damage  (Read 6185 times)
VE2PIO
Member

Posts: 17




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« on: August 25, 2016, 12:59:51 PM »

Hi, newbe question.
In a car, can i dammage the moile dual bander radio by turning on/off by cut the power source ?
Or i have to push on/off button everytime before shut the car?

thanks
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K9YLI
Member

Posts: 1196




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« Reply #1 on: August 25, 2016, 04:51:02 PM »

Of course.   most  electronic  devices are designed to  handle   'power failure'
I have had many radios for years  going on/off with the   car key.. (relay controlled.)
Just consider what  happens when a device has an internal power supply.
The external one is the same with a bit longer wires in between...
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KK4YDR
Member

Posts: 673




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« Reply #2 on: August 25, 2016, 06:20:42 PM »

Wont hurt it.

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ND6M
Member

Posts: 569




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« Reply #3 on: August 26, 2016, 06:24:17 AM »

Yeah, but think about what happens when you turn the key to start the engine.
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SOFAR
Member

Posts: 986




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« Reply #4 on: August 26, 2016, 06:39:20 AM »

Yeah, but think about what happens when you turn the key to start the engine.

Depends on the transceiver. Some require a button press after losing power.

The OP should have I included the model info.
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K9YLI
Member

Posts: 1196




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« Reply #5 on: August 27, 2016, 06:09:34 AM »

ND6M   .. when the key is in start, it removes power to the  internal radio etc.
If you use a relay  , wired to the key in run or acc..  then the power is interupted  ..
and  I have never had a problem withthe  hi voltage kick back from the  starter solenoid, affecting  any  device, as in newer cars the  computer has to be protected also ..
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K0BG
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Posts: 10248


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« Reply #6 on: August 28, 2016, 04:55:46 AM »

Kick from the starter solenoid???

If you wired your transceiver correctly, that almost cannot happen. The reason is, the diodes in the alternator act like Zener diodes and clamp any spike to about 18 vdc.
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VE2PIO
Member

Posts: 17




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« Reply #7 on: August 28, 2016, 07:32:34 PM »

Thanks for help.

I will run the power to the accesserories 12v to avoid problem.

73
ve2pio
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M0GVZ
Member

Posts: 344




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« Reply #8 on: September 08, 2016, 04:32:26 AM »


I will run the power to the accesserories 12v to avoid problem.

73
ve2pio

Never power the radio from the cars internal wiring. Positive wire on the radio to the positive terminal on the battery, negative wire to the body of the car near where the main battery negative terminal connects.
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W8JX
Member

Posts: 12094




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« Reply #9 on: September 08, 2016, 02:24:39 PM »

Yeah, but think about what happens when you turn the key to start the engine.

Depends on the transceiver. Some require a button press after losing power.

The OP should have I included the model info.

Pretty much any rig made in last 10 or 15 years requires a button push to turn on.
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Ham since 1969....  Old School 20wpm REAL Extra Class..
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